How to solve the heat dissipation and EMC problems of wireless chargers in one stop?
In the 5G era, wireless charging technology has also broken the traditional cable charging. It is a wireless charging technology that uses smart power transmission. It not only improves the efficiency and convenience of charging, but also has become an important trend in the consumer electronics industry. direction. As the usage rate of mobile phone wireless chargers increases, the power of wireless chargers also begins to expand. As wireless chargers increase in power consumption and shrink in size, the temperature control, heat dissipation, and electromagnetic shielding problems of internal electronic components need to be resolved.
In order to achieve better heat dissipation efficiency, the wireless charger adopts a variety of heat conduction structures and measures. In order to ensure heat dissipation, a layer of graphite heat dissipation film is usually attached to the charging coil, and then connected to the shell through a thermally conductive silicone sheet for the coil to dissipate heat. All electronic components are concentrated on the PCB board, which generates a lot of heat during work and requires heat conduction. The interface material conducts heat to the housing.
Especially in outdoor environments where active heat dissipation is limited, thermal interface materials have become an indispensable reliability material in the consumer electronics industry. It is recommended to use thermally conductive silicone sheets and thermally conductive double-sided adhesives to connect thermal integrated circuits and cooling components. However, if the heat dissipation element is too close to the connecting line, it will cause electromagnetic interference problems. At this time, it is necessary to use a thermally conductive absorbing material to increase the anti-interference performance. Only by effectively solving the problems of heat dissipation and electromagnetic interference can reliable hardware be produced.
Product characteristics of thermally conductive silicone sheet:
1. A variety of thermal conductivity is available: 1.5~13W/mK
2. High compressibility, soft and elastic
3. With self-adhesiveness, no additional external adhesive is required
4. Suitable for low pressure application environment
5. Low thermal resistance, high flexibility
6. Provide a variety of thickness and hardness options
Product features of thermally conductive double-sided adhesive:
1. Thermal conductivity: 0.8W/mK~1.6W/mK
2. High-performance thermal conductive acrylic adhesive
3. Double-sided pressure-sensitive tape with high bonding strength and various surfaces
4. The thermal impedance is small, which can effectively replace grease and mechanical fixation
Product characteristics of thermally conductive absorbing materials:
1. Good thermal conductivity
2. Soft and not fragile, light and thin, easy to process and cut, easy to use, and can be installed in a small space
3. The product needs to be bonded or pressed on the metal bottom plate to achieve a good wave absorbing effect
4. The product can correspond to diversified sizes and shapes
5. High temperature resistance, good flexibility
6. Halogen-free and lead-free, meeting the RoHs directive.
